# Definition of identity matrix

math.la.d.mat.identity

# The Matrix Inverse - Definition

Motivation and definition of the inverse of a matrix

##### math.la.t.mat.inv.unique
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# Notation for matrix entries, size of a matrix, etc

Notation for matrix entries, diagonal matrix, square matrix, identity matrix, and zero matrix.

##### math.la.d.mat.zero
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February 17th, 2017
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# Matrix Inverse

The definition of matrix inverse is motivated by considering multiplicative inverse. The identity matrix and matrix inverse are defined.

##### math.la.t.mat.mult.identity
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# Nonsingular Matrices - A First Course in Linear Algebra

In this section we specialize further and consider matrices with equal numbers of rows and columns, which when considered as coefficient matrices lead to systems with equal numbers of equations and variables. We will see in the second half of the course (Chapter D, Chapter E, Chapter LT, Chapter R) that these matrices are especially important.

##### math.la.d.mat.identity
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